Hex Bolts Grade 5 Yellow Zinc 1/2 -20 x 3 1/2 (Quantity: 25 pcs) Partially Threaded UNF Thread (Thread Size: 1/2 ) x (Length: 3 1/2 )

Grade 5 Steel with a Yellow Zinc Finish and manufactured to ASME B18.2.1 Zinc-plated steel screws to resist corrosion in wet environments Meets ASME B18.2.1 and SAE J429 specifications These are PARTIALLY Threaded Bolts with a minium of 1.25 inches of thread Head Height: 5/16 in. / Width Across the Flats: 3/4 in.